Panasonic SC-HTB490 Operating Instructions Manual page 8

Connecting the AC mains lead
Conserving power
The system consumes a small amount of power when it is in standby mode. Disconnect the power supply
if you do not use the system.
The main unit will automatically switch to standby mode when no signal is input and no operation is
performed for approx. 20 minutes. Refer to page 17 "Auto off" to switch this function off.
Note:
The active subwoofer is in the standby condition when the AC mains lead is connected. The primary circuit is always "live" as long
as the AC mains lead is connected to an electrical outlet.
8
To household
mains socket
AC mains lead
-1.5 m
AC mains lead
-1.2 m